Paul - I’m not using silicone pans for pies so I can’t completely answer your question. I’m not sure if they would be harder to use - I would think that it might be a bit challenging the first time, but you’d be able to get the hang of it.
Personally, I’m not a big fan of silicone pans. As a somewhat clumsy person, I can already pictured myself accidentally bending one side and send the pie flying to the floor .
I currently own ceramic pie pan and stainless steel (not non stick) fluted pie pan.

I love my glass pie pans and have not been really tempted to try silicone for pies. For one thing, you want good browning on a pie crust. For another, pie crust is not as flexible as a cake—more brittle, prone to cracking if the pan flexes and silicone is so flexible!